Non Spin/HSFClub Certificate2025
SlipfreeFIN11819
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
Rated boat velocities in knots
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat Angles44.1°44.1°41.9°40.4°39.1°38.5°38.2°38.5°39.5°
Beat VMG2.353.253.964.494.834.995.065.084.99
52°3.715.005.926.546.887.067.137.197.17
60°3.955.286.186.747.057.247.337.417.42
75°4.125.476.376.897.207.437.607.797.89
90°3.995.366.326.897.247.507.738.118.33
110°3.424.755.836.637.117.457.758.328.84
120°3.194.495.586.436.987.347.658.278.90
135°2.733.955.035.926.617.077.408.008.64
150°2.263.354.395.286.046.667.087.698.27
Run VMG1.962.903.804.615.356.016.587.327.88
Gybe Angles146.8°146.8°151.4°157.3°164.9°171.8°177.2°179.5°179.2°
APH ToD:604.2CDL: 8.751APH ToT: 0.9931CertNo:
BOAT
ClassDufour 34DesignerUmberto FelciBuilderDufour YachtAge dateSeries date07/2002Offset fileDUF34PERF.offData fileFIN11819
HULL
Length Overall10.280 mMaximum Beam3.482 mDraft1.942 mDisplacement5,500 kgDLR6.8271IMS DivisionCruiser/RacerDynamic Allowance0.340%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 3 bladesDiameter0.400m
CREW
Maximum weight480 kg(declared)Minimum weight350 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail31.6132.37Headsail Luffed32.7732.77Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail9.31Storm Jib8.76Heavy Weather Jib23.63
SAIL LIMITS
Headsails5
✱ Zero set flying
Spinnakers0
✱ Spinnaker pole aboard
STABILITY
Righting MomentN/AStability IndexN/A
The owner and any other person in charge is responsible that boat is complying with her certificate in accordance with RRS 78.1 and ORC Rule 304.
Non Spin/HSFClub Certificate2025
SlipfreeFIN11819
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
Time Allowances in secs/NM
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat VMG1531.51107.6908.3802.5745.0721.9711.8709.3722.2
52°971.6720.6607.8550.8523.1510.1504.8500.8501.9
60°910.9682.1582.4534.5510.5497.5491.1485.7484.9
75°873.9657.9565.5522.5499.7484.5473.5462.1456.4
90°901.6671.3569.8522.3497.5480.2465.5444.0432.0
110°1053.3757.7617.4543.2506.2483.5464.6432.4407.2
120°1126.9801.5644.8559.9515.6490.2470.3435.3404.4
135°1316.6912.0715.1608.3544.8509.3486.7449.9416.6
150°1591.61074.3820.5681.7595.6540.8508.4468.4435.1
Run VMG1836.41240.5946.5780.6673.5598.5546.7491.5456.7
Selected Courses
Windward / Leeward1680.91174.0927.4791.6709.3660.2629.3600.4589.4
All purpose1253.1893.3721.6630.2578.0548.1529.2507.0494.1
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward747.50.8026
All purpose604.20.9931
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance660.80.9080
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7360
Downwind "popa"0.7958
70% up, 30% down "Ilhabela"0.7530
30% up, 70% down "Ilhabela-inverso"0.7768
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Predominantly Upwind640.80.9364
Predominantly Downwind633.00.9479
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low807.50.7431
Triple Number AP Medium600.01.0000
Triple Number AP High525.61.1416
Triple Number Windward/Leeward Low1100.50.5452
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Single Number Predominant Upwind667.90.8983
Single Number Predominant Reaching605.10.9915
Single Number Predominant Downwind666.60.9001
Predominant Upwind - Low946.00.6343
Predominant Upwind - Low/Med711.50.8433
Predominant Upwind - Medium616.30.9735
Predominant Upwind - Med/High569.71.0531
Predominant Upwind - High554.41.0822
Predominant Downwind Low1030.50.5822
Predominant Downwind Low/Med735.60.8157
Predominant Downwind Medium605.80.9905
Predominant Downwind Med/High527.61.1373
Predominant Downwind High490.61.2231
Predominant Reaching Low871.50.6884
Predominant Reaching Low/Med650.50.9224
Predominant Reaching Medium559.01.0733
Predominant Reaching Med/High507.51.1824
Predominant Reaching High482.31.2439
SA/DSPL Upwind20.55SA/DSPL Downwind20.55
Scoring OptionTODTOT
5-Band Windward/Leeward Low1239.90.4839
5-Band Windward/Leeward Low/Med883.60.6790
5-Band Windward/Leeward Medium726.30.8261
5-Band Windward/Leeward Med/High636.40.9428
5-Band Windward/Leeward High603.50.9942
Windward/Leeward 60-40 Low1224.60.4899
Windward/Leeward 60-40 Low/Med882.20.6801
Windward/Leeward 60-40 Medium733.40.8182
Windward/Leeward 60-40 Med/High652.30.9198
Windward/Leeward 60-40 High625.20.9597
5-Band AP Low908.50.6604
5-Band AP Low/Med693.50.8652
5-Band AP Medium589.61.0177
5-Band AP Med/High532.71.1263
5-Band AP High508.61.1797
5-Band SF Bay Tour - Low1056.60.5678
5-Band SF Bay Tour - Low/Med841.30.7132
5-Band SF Bay Tour - Medium699.30.8579
5-Band SF Bay Tour - Med/High622.10.9644
5-Band SF Bay Tour - High594.21.0097
Chicago-Mac Upwind0.8678
Chicago-Mac All Purpose0.8701
Chicago-Mac Downwind0.8621
Bayview-Mac Cove Island0.6172
Bayview-Mac Shore0.6245
Harvest Moon Regatta523.61.1459
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance660.80.9080
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance660.80.9080
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance660.8
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating660.80.9080
FinRating, kevyt tuuli1221.10.8189
FinRating, kova tuuli512.60.9753
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9080
Triple Number Coastal/Long Distance Low0.7431
Triple Number Coastal/Long Distance Medium1.0002
Triple Number Coastal/Long Distance High1.1416
Triple Number Windward/Leeward Low0.5710
Triple Number Windward/Leeward Medium0.8080
Triple Number Windward/Leeward High0.9582
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
For information
General Purpose Handicap (GPH)684.5
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance660.80.9080
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance660.80.9080
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance660.80.9080
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low807.4
Triple Number Coastal/Long Distance Medium599.9
Triple Number Coastal/Long Distance High525.6
Triple Number Windward/Leeward Low1050.8
Triple Number Windward/Leeward Medium742.6
Triple Number Windward/Leeward High626.2
Predominantly Upwind640.8
Predominantly Downwind633.0
Predominantly Reaching596.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance660.80.9080
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7431
Triple Number Coastal/Long Distance Medium1.0002
Triple Number Coastal/Long Distance High1.1416
Triple Number Windward/Leeward Low0.5710
Triple Number Windward/Leeward Medium0.8080
Triple Number Windward/Leeward High0.9582
Coastal/Long Distance0.9080
Predominantly Upwind0.9364
Predominantly Downwind0.9479
For information
General Purpose Handicap (GPH)684.5
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9931
Distanseseilas Trippeltall svak vind0.7431
Distanseseilas Trippeltall mellomvind1.0002
Distanseseilas Trippeltall sterk vind1.1416
Pølsebane Trippeltall svak vind0.5710
Pølsebane Trippeltall mellomvind0.8080
Pølsebane Trippeltall sterk vind0.9582
Motvind Singeltall0.9364
Medvind Singeltall0.9479
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Coastal/Long Distance660.80.9080
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind640.80.9364
Predominantly Downwind633.00.9479
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore592.71.0123
Cape Doctor Coastal498.01.2049
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7431
Triple Number Coastal/Long Distance Medium1.0002
Triple Number Coastal/Long Distance High1.1416
Triple Number Windward/Leeward Low0.5710
Triple Number Windward/Leeward Medium0.8080
Triple Number Windward/Leeward High0.9582
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7431
Triple Number Coastal/Long Distance Medium1.0002
Triple Number Coastal/Long Distance High1.1416
Triple Number Windward/Leeward Low0.5710
Triple Number Windward/Leeward Medium0.8080
Triple Number Windward/Leeward High0.9582
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance660.80.9080
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Predominantly Upwind640.80.9364
Predominantly Downwind633.00.9479
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance660.80.9080
Triple Number Coastal/Long Distance Low807.40.7431
Triple Number Coastal/Long Distance Medium599.91.0002
Triple Number Coastal/Long Distance High525.61.1416
Triple Number Windward/Leeward Low1050.80.5710
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1817.11180.7872.8712.3617.5569.3535.4486.0470.1
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low807.50.7431
Triple Number AP Medium600.01.0000
Triple Number AP High525.61.1416
Triple Number Windward/Leeward Low1100.50.5452
Triple Number Windward/Leeward Medium742.60.8080
Triple Number Windward/Leeward High626.20.9582
Single Number Predominant Upwind667.90.8983
Single Number Predominant Reaching605.10.9915
Single Number Predominant Downwind666.60.9001
Predominant Upwind - Low946.00.6343
Predominant Upwind - Low/Med711.50.8433
Predominant Upwind - Medium616.30.9735
Predominant Upwind - Med/High569.71.0531
Predominant Upwind - High554.41.0822
Predominant Downwind Low1030.50.5822
Predominant Downwind Low/Med735.60.8157
Predominant Downwind Medium605.80.9905
Predominant Downwind Med/High527.61.1373
Predominant Downwind High490.61.2231
Predominant Reaching Low871.50.6884
Predominant Reaching Low/Med650.50.9224
Predominant Reaching Medium559.01.0733
Predominant Reaching Med/High507.51.1824
Predominant Reaching High482.31.2439
SA/DSPL Upwind20.55SA/DSPL Downwind20.55
Scoring OptionTODTOT
5-Band Windward/Leeward Low1239.90.4839
5-Band Windward/Leeward Low/Med883.60.6790
5-Band Windward/Leeward Medium726.30.8261
5-Band Windward/Leeward Med/High636.40.9428
5-Band Windward/Leeward High603.50.9942
Windward/Leeward 60-40 Low1224.60.4899
Windward/Leeward 60-40 Low/Med882.20.6801
Windward/Leeward 60-40 Medium733.40.8182
Windward/Leeward 60-40 Med/High652.30.9198
Windward/Leeward 60-40 High625.20.9597
5-Band AP Low908.50.6604
5-Band AP Low/Med693.50.8652
5-Band AP Medium589.61.0177
5-Band AP Med/High532.71.1263
5-Band AP High508.61.1797
5-Band SF Bay Tour - Low1056.60.5678
5-Band SF Bay Tour - Low/Med841.30.7132
5-Band SF Bay Tour - Medium699.30.8579
5-Band SF Bay Tour - Med/High622.10.9644
5-Band SF Bay Tour - High594.21.0097
Chicago-Mac Upwind0.8678
Chicago-Mac All Purpose0.8701
Chicago-Mac Downwind0.8621
Bayview-Mac Cove Island0.6172
Bayview-Mac Shore0.6245
Harvest Moon Regatta523.61.1459
Non Spin/HSFClub Certificate2025
SlipfreeFIN11819
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassDufour 34MeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.280Max. Beam3.482Draft1.942Displacement5,500Wetted area24.10IMS L9.467LSM09.304Acc. length10.300Sink (kg/mm) 18.64
VCGD0.033VCGM0.049RM Rated (kg·m) 122.4Limit of positive stability(°) N/AStability IndexN/ADefault crew weight621Declared crew weight480
PROPELLER
Propeller TypeFolding 3 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.400PBWPIPA0.0041
EDL2.000ST10.065ST20.180
ST30.180ST40.110ST50.350
RIG
Forestay tensionFixedInner stayFixedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders1Rotating mastNo
P11.820IG13.230ISP13.180MDT10.125MDL10.198MDT2MDL2TLMWGO
E4.500J3.740BAS1.430FSDSFJSPL3.750WPLTPS3.740BDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date26/02/2020
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Non Spin/HSFClub Certificate2025
SlipfreeFIN11819
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment20.200.981.732.863.7531.6115/06/2022
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment20.081.272.585.2612.47NoNo 32.7730.070.611.182.433.795.2312.58NoNo 31.7115/06/2022
CRUISER/RACER REQUIREMENTS*
Accommodation length10.3 mTable area0.44 m²Headroom1.72 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity86 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity56 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.